refactor: reformat baufile.csx
#23 green: added TaskDependencies.MultipleDependencies
#23 green: added TaskDependencies.NestedDependencies
#23 green: added TaskDependencies.RepeatedDependency
#23 green: added TaskDependencies.CircularDependency
#23 green: added TaskDependencies.NonExistentDependency
#23 green: added TaskDependencies.DependencyFails
#23 refactor: reformatted test baufiles to match dogfooding baufile
closes #23
Merge pull request #26 from adamralph/23

#23 added remaining tests